How to convert string to undefined or boolean?

[petrvecera]

For example we can use function like this:

function convertStringToValue(str) {
  if (str === "undefined") {
    return undefined;
  } else {
    return str === "true";
  }
}

Example:

let str1 = "undefined";
let str2 = "true";
let str3 = "false";
console.log(convertStringToValue(str1)); // undefined
console.log(convertStringToValue(str2)); // true
console.log(convertStringToValue(str3)); // false